Beating a Dead Horse - Page 2 -
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post #16 of 19 Old 12-24-2013, 01:14 PM
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1990 YJ Wrangler 
Join Date: Jun 2008
Location: st. louis
Posts: 2,116
Originally Posted by Kingston View Post
ok had to call re quick to a buddy to go look at the picture theres, whatever it is circled in red, that is were the second line from the Evap can is leading to....but as u see in the pic the other end is just open with no line...WTH is this? whats it for and do i need it? if not can i just unhook that line goin from the can to it or do i need to T this is some place.
That is the Decel Valve. Mine leaked, so I removed it.

FWIW, the EGR and Charcoal canister do not hurt performance or fuel economy in any way. The only benefit of removing them is to pollute more.

I vaguely remember that Maryland is like we are here in Missouri, that they check for the EGR valve and Charcoal Canister as a part of the safety inspection. I would double check that.

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post #17 of 19 Old 12-24-2013, 07:24 PM Thread Starter
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1987 YJ Wrangler 
Join Date: Dec 2013
Location: Cockeysville
Posts: 133
The vacuum advance for the distributor is supposed to be on a ported line. Quick way to test the line its on...start the motor, take the vac line off going to the dist., if the tube that you took the line off of has any vac, then its the wrong tube.

Vacuum advance works to advance timing when you are on the throttle, NOT when you are idling. If the motor is at an idle, the line going to the dist wont have any vacuum on it.

Could that be why im not idleing? And have to feather the gas to stay running

1987 YJ Wrangler 4.2ltr 5 speed 4" rough country lift with 31x10.50 tires

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post #18 of 19 Old 12-25-2013, 07:40 PM
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1983 CJ7 
Join Date: May 2009
Location: Texas Hill Country
Posts: 6,749
Most of us on the CJ board run manifold vacuum for its many benefits over ported vacuum. I'd keep it on manifold vacuum, especially with a smaller 32/36.


Live in a way that those who know you but don't know God will come to know God because they know you.
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post #19 of 19 Old 12-26-2013, 04:42 PM
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1990 CJ7 
Join Date: Nov 2008
Location: Ga
Posts: 5,145
Originally Posted by swatson454 View Post
Most of us on the CJ board run manifold vacuum for its many benefits over ported vacuum. I'd keep it on manifold vacuum, especially with a smaller 32/36.

Manifold vac is better for your engine and drivability

418 miles on 19 gallons of gas. Can't beat the BBD !
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